diff options
author | Stefan Metzmacher <metze@samba.org> | 2005-11-18 13:30:18 +0000 |
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committer | Gerald (Jerry) Carter <jerry@samba.org> | 2007-10-10 13:46:27 -0500 |
commit | 6d34ab056f70d85c3207696fac4fbb9e7f437b14 (patch) | |
tree | df735be145469b92302f3dda8112129d3f4f5e18 /source4/smb_server/smb/sesssetup.c | |
parent | da4afcb1186fd833c08d851b94a1dcfb9e1c203b (diff) | |
download | samba-6d34ab056f70d85c3207696fac4fbb9e7f437b14.tar.gz samba-6d34ab056f70d85c3207696fac4fbb9e7f437b14.tar.bz2 samba-6d34ab056f70d85c3207696fac4fbb9e7f437b14.zip |
r11786: move all SMB protocol specific stuff to smb_server/smb/
metze
(This used to be commit 5fea278cb65076cea71bb6c921e51c4feffc37d7)
Diffstat (limited to 'source4/smb_server/smb/sesssetup.c')
-rw-r--r-- | source4/smb_server/smb/sesssetup.c | 370 |
1 files changed, 370 insertions, 0 deletions
diff --git a/source4/smb_server/smb/sesssetup.c b/source4/smb_server/smb/sesssetup.c new file mode 100644 index 0000000000..3f09346243 --- /dev/null +++ b/source4/smb_server/smb/sesssetup.c @@ -0,0 +1,370 @@ +/* + Unix SMB/CIFS implementation. + handle SMBsessionsetup + Copyright (C) Andrew Tridgell 1998-2001 + Copyright (C) Andrew Bartlett <abartlet@samba.org> 2001-2005 + Copyright (C) Jim McDonough 2002 + Copyright (C) Luke Howard 2003 + Copyright (C) Stefan Metzmacher 2005 + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 2 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software + Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. +*/ + +#include "includes.h" +#include "version.h" +#include "auth/auth.h" +#include "smb_server/smb_server.h" +#include "smbd/service_stream.h" +#include "libcli/nbt/libnbt.h" + +/* + setup the OS, Lanman and domain portions of a session setup reply +*/ +static void sesssetup_common_strings(struct smbsrv_request *req, + char **os, char **lanman, char **domain) +{ + (*os) = talloc_asprintf(req, "Unix"); + (*lanman) = talloc_asprintf(req, "Samba %s", SAMBA_VERSION_STRING); + (*domain) = talloc_asprintf(req, "%s", lp_workgroup()); +} + + +/* + handler for old style session setup +*/ +static NTSTATUS sesssetup_old(struct smbsrv_request *req, union smb_sesssetup *sess) +{ + NTSTATUS status; + struct auth_usersupplied_info *user_info = NULL; + struct auth_serversupplied_info *server_info = NULL; + struct auth_session_info *session_info; + struct smbsrv_session *smb_sess; + const char *remote_machine = NULL; + + sess->old.out.vuid = 0; + sess->old.out.action = 0; + + if (!req->smb_conn->negotiate.done_sesssetup) { + req->smb_conn->negotiate.max_send = sess->old.in.bufsize; + } + + if (req->smb_conn->negotiate.calling_name) { + remote_machine = req->smb_conn->negotiate.calling_name->name; + } + + if (!remote_machine) { + remote_machine = socket_get_peer_addr(req->smb_conn->connection->socket, req); + } + + user_info = talloc(req, struct auth_usersupplied_info); + NT_STATUS_HAVE_NO_MEMORY(user_info); + + user_info->mapped_state = False; + user_info->logon_parameters = 0; + user_info->flags = 0; + user_info->client.account_name = sess->old.in.user; + user_info->client.domain_name = sess->old.in.domain; + user_info->workstation_name = remote_machine; + user_info->remote_host = socket_get_peer_addr(req->smb_conn->connection->socket, user_info); + + user_info->password_state = AUTH_PASSWORD_RESPONSE; + user_info->password.response.lanman = sess->old.in.password; + user_info->password.response.lanman.data = talloc_steal(user_info, sess->old.in.password.data); + user_info->password.response.nt = data_blob(NULL, 0); + + status = auth_check_password(req->smb_conn->negotiate.auth_context, + req, user_info, &server_info); + if (!NT_STATUS_IS_OK(status)) { + return auth_nt_status_squash(status); + } + + /* This references server_info into session_info */ + status = auth_generate_session_info(req, server_info, &session_info); + if (!NT_STATUS_IS_OK(status)) { + return auth_nt_status_squash(status); + } + + /* allocate a new session */ + smb_sess = smbsrv_session_new(req->smb_conn, NULL); + if (!smb_sess) { + return NT_STATUS_ACCESS_DENIED; + } + + /* Ensure this is marked as a 'real' vuid, not one + * simply valid for the session setup leg */ + status = smbsrv_session_sesssetup_finished(smb_sess, session_info); + if (!NT_STATUS_IS_OK(status)) { + return auth_nt_status_squash(status); + } + + /* To correctly process any AndX packet (like a tree connect) + * we need to fill in the session on the request here */ + req->session = smb_sess; + sess->old.out.vuid = smb_sess->vuid; + + sesssetup_common_strings(req, + &sess->old.out.os, + &sess->old.out.lanman, + &sess->old.out.domain); + + return NT_STATUS_OK; +} + + +/* + handler for NT1 style session setup +*/ +static NTSTATUS sesssetup_nt1(struct smbsrv_request *req, union smb_sesssetup *sess) +{ + NTSTATUS status; + struct auth_context *auth_context; + struct auth_usersupplied_info *user_info = NULL; + struct auth_serversupplied_info *server_info = NULL; + struct auth_session_info *session_info; + struct smbsrv_session *smb_sess; + const char *remote_machine = NULL; + + sess->nt1.out.vuid = 0; + sess->nt1.out.action = 0; + + if (!req->smb_conn->negotiate.done_sesssetup) { + req->smb_conn->negotiate.max_send = sess->nt1.in.bufsize; + req->smb_conn->negotiate.client_caps = sess->nt1.in.capabilities; + } + + if (req->smb_conn->negotiate.spnego_negotiated) { + if (sess->nt1.in.user && *sess->nt1.in.user) { + /* We can't accept a normal login, because we + * don't have a challenge */ + return NT_STATUS_LOGON_FAILURE; + } + + /* TODO: should we use just "anonymous" here? */ + status = auth_context_create(req, lp_auth_methods(), + &auth_context, + req->smb_conn->connection->event.ctx); + NT_STATUS_NOT_OK_RETURN(status); + } else { + auth_context = req->smb_conn->negotiate.auth_context; + } + + if (req->smb_conn->negotiate.calling_name) { + remote_machine = req->smb_conn->negotiate.calling_name->name; + } + + if (!remote_machine) { + remote_machine = socket_get_peer_addr(req->smb_conn->connection->socket, req); + } + + user_info = talloc(req, struct auth_usersupplied_info); + NT_STATUS_HAVE_NO_MEMORY(user_info); + + user_info->mapped_state = False; + user_info->logon_parameters = 0; + user_info->flags = 0; + user_info->client.account_name = sess->nt1.in.user; + user_info->client.domain_name = sess->nt1.in.domain; + user_info->workstation_name = remote_machine; + user_info->remote_host = socket_get_peer_addr(req->smb_conn->connection->socket, user_info); + + user_info->password_state = AUTH_PASSWORD_RESPONSE; + user_info->password.response.lanman = sess->nt1.in.password1; + user_info->password.response.lanman.data = talloc_steal(user_info, sess->nt1.in.password1.data); + user_info->password.response.nt = sess->nt1.in.password2; + user_info->password.response.nt.data = talloc_steal(user_info, sess->nt1.in.password2.data); + + status = auth_check_password(auth_context, req, user_info, &server_info); + if (!NT_STATUS_IS_OK(status)) { + return auth_nt_status_squash(status); + } + + /* This references server_info into session_info */ + status = auth_generate_session_info(req, server_info, &session_info); + if (!NT_STATUS_IS_OK(status)) { + return auth_nt_status_squash(status); + } + + /* allocate a new session */ + smb_sess = smbsrv_session_new(req->smb_conn, NULL); + if (!smb_sess) { + return NT_STATUS_ACCESS_DENIED; + } + + /* Ensure this is marked as a 'real' vuid, not one + * simply valid for the session setup leg */ + status = smbsrv_session_sesssetup_finished(smb_sess, session_info); + if (!NT_STATUS_IS_OK(status)) { + return auth_nt_status_squash(status); + } + + /* To correctly process any AndX packet (like a tree connect) + * we need to fill in the session on the request here */ + req->session = smb_sess; + sess->nt1.out.vuid = smb_sess->vuid; + + sesssetup_common_strings(req, + &sess->nt1.out.os, + &sess->nt1.out.lanman, + &sess->nt1.out.domain); + + if (!session_info->server_info->authenticated) { + return NT_STATUS_OK; + } + + if (!srv_setup_signing(req->smb_conn, &session_info->session_key, &sess->nt1.in.password2)) { + /* Already signing, or disabled */ + return NT_STATUS_OK; + } + + /* Force check of the request packet, now we know the session key */ + req_signing_check_incoming(req); +/* TODO: why don't we check the result here? */ + + /* Unfortunetly win2k3 as a client doesn't sign the request + * packet here, so we have to force signing to start again */ + + srv_signing_restart(req->smb_conn, &session_info->session_key, &sess->nt1.in.password2); + + return NT_STATUS_OK; +} + + +/* + handler for SPNEGO style session setup +*/ +static NTSTATUS sesssetup_spnego(struct smbsrv_request *req, union smb_sesssetup *sess) +{ + NTSTATUS status = NT_STATUS_ACCESS_DENIED; + struct smbsrv_session *smb_sess; + struct gensec_security *gensec_ctx; + struct auth_session_info *session_info = NULL; + uint16_t vuid; + + sess->spnego.out.vuid = 0; + sess->spnego.out.action = 0; + + sesssetup_common_strings(req, + &sess->spnego.out.os, + &sess->spnego.out.lanman, + &sess->spnego.out.workgroup); + + if (!req->smb_conn->negotiate.done_sesssetup) { + req->smb_conn->negotiate.max_send = sess->nt1.in.bufsize; + req->smb_conn->negotiate.client_caps = sess->nt1.in.capabilities; + } + + vuid = SVAL(req->in.hdr,HDR_UID); + smb_sess = smbsrv_session_find_sesssetup(req->smb_conn, vuid); + if (smb_sess) { + gensec_ctx = smb_sess->gensec_ctx; + } else { + status = gensec_server_start(req, &gensec_ctx, + req->smb_conn->connection->event.ctx); + if (!NT_STATUS_IS_OK(status)) { + DEBUG(1, ("Failed to start GENSEC server code: %s\n", nt_errstr(status))); + return status; + } + + gensec_set_credentials(gensec_ctx, req->smb_conn->negotiate.server_credentials); + + gensec_set_target_service(gensec_ctx, "cifs"); + + gensec_want_feature(gensec_ctx, GENSEC_FEATURE_SESSION_KEY); + + status = gensec_start_mech_by_oid(gensec_ctx, GENSEC_OID_SPNEGO); + if (!NT_STATUS_IS_OK(status)) { + DEBUG(1, ("Failed to start GENSEC SPNEGO server code: %s\n", nt_errstr(status))); + return status; + } + + smb_sess = smbsrv_session_new(req->smb_conn, gensec_ctx); + if (!smb_sess) { + return NT_STATUS_ACCESS_DENIED; + } + } + + status = gensec_update(gensec_ctx, req, sess->spnego.in.secblob, &sess->spnego.out.secblob); + if (NT_STATUS_IS_OK(status)) { + DATA_BLOB session_key; + + status = gensec_session_info(gensec_ctx, &session_info); + if (!NT_STATUS_IS_OK(status)) { + talloc_free(smb_sess); + return status; + } + + status = gensec_session_key(gensec_ctx, + &session_key); +/* TODO: what if getting the session key failed? */ + if (NT_STATUS_IS_OK(status) + && session_info->server_info->authenticated + && srv_setup_signing(req->smb_conn, &session_key, NULL)) { + /* Force check of the request packet, now we know the session key */ + req_signing_check_incoming(req); + + srv_signing_restart(req->smb_conn, &session_key, NULL); + } + + } else if (NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED)) { + } else { + status = auth_nt_status_squash(status); + + /* This invalidates the VUID of the failed login */ + talloc_free(smb_sess); + return status; + } + + if (NT_STATUS_IS_OK(status)) { + /* Ensure this is marked as a 'real' vuid, not one + * simply valid for the session setup leg */ + status = smbsrv_session_sesssetup_finished(smb_sess, session_info); + if (!NT_STATUS_IS_OK(status)) { + return auth_nt_status_squash(status); + } + req->session = smb_sess; + } + sess->spnego.out.vuid = smb_sess->vuid; + + return status; +} + +/* + backend for sessionsetup call - this takes all 3 variants of the call +*/ +NTSTATUS sesssetup_backend(struct smbsrv_request *req, + union smb_sesssetup *sess) +{ + NTSTATUS status = NT_STATUS_INVALID_LEVEL; + + switch (sess->old.level) { + case RAW_SESSSETUP_OLD: + status = sesssetup_old(req, sess); + break; + case RAW_SESSSETUP_NT1: + status = sesssetup_nt1(req, sess); + break; + case RAW_SESSSETUP_SPNEGO: + status = sesssetup_spnego(req, sess); + break; + } + + if (NT_STATUS_IS_OK(status)) { + req->smb_conn->negotiate.done_sesssetup = True; + } + + return status; +} + + |